| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > nn0ex | Structured version Visualization version Unicode version | ||
| Description: The set of nonnegative integers exists. (Contributed by NM, 18-Jul-2004.) |
| Ref | Expression |
|---|---|
| nn0ex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-n0 11293 |
. 2
| |
| 2 | nnex 11026 |
. . 3
| |
| 3 | snex 4908 |
. . 3
| |
| 4 | 2, 3 | unex 6956 |
. 2
|
| 5 | 1, 4 | eqeltri 2697 |
1
|
| Copyright terms: Public domain | W3C validator |